28642756 has 24 divisors (see below), whose sum is σ = 53257176. Its totient is φ = 13432320.

The previous prime is 28642753. The next prime is 28642759. The reversal of 28642756 is 65724682.

It is an interprime number because it is at equal distance from previous prime (28642753) and next prime (28642759).

It can be written as a sum of positive squares in 4 ways, for example, as 12110400 + 16532356 = 3480^2 + 4066^2 .

It is not an unprimeable number, because it can be changed into a prime (28642753) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26466 + ... + 27526.

It is an arithmetic number, because the mean of its divisors is an integer number (2219049).

Almost surely, 2^28642756 is an apocalyptic number.

It is an amenable number.

28642756 is a deficient number, since it is larger than the sum of its proper divisors (24614420).

28642756 is a wasteful number, since it uses less digits than its factorization.

28642756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1479 (or 1477 counting only the distinct ones).

The product of its digits is 161280, while the sum is 40.

The square root of 28642756 is about 5351.8927492991. The cubic root of 28642756 is about 305.9648955130.

The spelling of 28642756 in words is "twenty-eight million, six hundred forty-two thousand, seven hundred fifty-six".